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Finding the Fourth Proportional to 78,230.56, 117,154.45 and 70,648.96

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Solution

The fourth proportional to 78,230.56, 117,154.45 and 70,648.96 is: 105,800.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,230.56 : 117,154.45 = 70,648.96 : x
  2. Step 2: Convert to fraction form
    78,230.56/117,154.45 = 70,648.96/x
  3. Step 3: Cross multiply
    78,230.56x = 117,154.45 × 70,648.96
  4. Step 4: Simplify right side
    78,230.56x = 8,276,840,066.96
  5. Step 5: Solve for x
    x = 8,276,840,066.96/78,230.56
  6. Step 6: Final answer
    x = 105,800.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.